Sometimes your Mac's parameter RAM (PRAM) becomes scrambled and needs to be reset. This can cause startup problems for your Mac. This small piece of memory isn’t erased or forgotten when you shut down your Mac. A small amount of your computer’s memory, called “parameter random-access memory” or PRAM, stores certain settings in a location that OS X can access quickly. … [Read more...] about How To Reset PRAM on a Mac
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